On May 10, 2014, at 7:51 PM, Chris Murphy <li...@colorremedies.com> wrote:
> kernel 3.15.0-0.rc5.git0.1.fc21.x86_64
> btrfs-progs 3.14
>
> /dev/sdb2 = existing btrfs fs
> /dev/sdc3 = unformatted partition
>
>
> # btrfstune -S1 /dev/sdb2
> # mount /dev/sdb2 /mnt
> mount: /dev/sdb2 is write-protected, mounting read-only
> # btrfs device add /dev/sdc3 /mnt
> Performing full device TRIM (75.90GiB) ...
> # btrfs fi show
> Label: 'rawhide' uuid: d372e5d1-386f-460c-b036-611469e0155e
> Total devices 1 FS bytes used 7.55GiB
> devid 1 size 79.31GiB used 11.04GiB path /dev/sda3
>
> btrfs: utils.c:1769: get_fs_info: Assertion `!(ndevs >=
> fi_args->num_devices)' failed.
The problem only happens when added device sdc3 is mounted at /mnt. Otherwise
btrfs fi show works. The following is strace when added device sdc3 is mounted,
while mount shows the seed device mounted:
# cat /proc/self/mountinfo
84 58 0:44 / /mnt rw,relatime shared:35 - btrfs /dev/sdb2
rw,seclabel,space_cache
# strace btrfs fi show
execve("/usr/sbin/btrfs", ["btrfs", "fi", "show"], [/* 24 vars */]) = 0
brk(0) = 0x2669000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fae8d2c3000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=84288, ...}) = 0
mmap(NULL, 84288, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fae8d2ae000
close(3) = 0
open("/lib64/libuuid.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\20\25\0\0\0\0\0\0"...,
832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=19944, ...}) = 0
mmap(NULL, 2113920, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7fae8ce9c000
mprotect(0x7fae8cea0000, 2093056, PROT_NONE) = 0
mmap(0x7fae8d09f000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3000) = 0x7fae8d09f000
close(3) = 0
open("/lib64/libblkid.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0`\205\0\0\0\0\0\0"...,
832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=260640, ...}) = 0
mmap(NULL, 2353896, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7fae8cc5d000
mprotect(0x7fae8cc97000, 2097152, PROT_NONE) = 0
mmap(0x7fae8ce97000, 16384, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3a000) = 0x7fae8ce97000
mmap(0x7fae8ce9b000, 2792, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fae8ce9b000
close(3) = 0
open("/lib64/libm.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\20V\0\0\0\0\0\0"...,
832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1171192, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fae8d2ad000
mmap(NULL, 3178856, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7fae8c954000
mprotect(0x7fae8ca5c000, 2093056, PROT_NONE) = 0
mmap(0x7fae8cc5b000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x107000) = 0x7fae8cc5b000
close(3) = 0
open("/lib64/libz.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\0\"\0\0\0\0\0\0"...,
832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=89992, ...}) = 0
mmap(NULL, 2183688, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7fae8c73e000
mprotect(0x7fae8c753000, 2093056, PROT_NONE) = 0
mmap(0x7fae8c952000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x14000) = 0x7fae8c952000
close(3) = 0
open("/lib64/liblzo2.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\0&\0\0\0\0\0\0"...,
832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=134440, ...}) = 0
mmap(NULL, 2228456, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7fae8c51d000
mprotect(0x7fae8c53d000, 2093056, PROT_NONE) = 0
mmap(0x7fae8c73c000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1f000) = 0x7fae8c73c000
close(3) = 0
open("/lib64/libpthread.so.0", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\200`\0\0\0\0\0\0"...,
832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=145568, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fae8d2ac000
mmap(NULL, 2213072, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7fae8c300000
mprotect(0x7fae8c317000, 2097152, PROT_NONE) = 0
mmap(0x7fae8c517000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x17000) = 0x7fae8c517000
mmap(0x7fae8c519000, 13520, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fae8c519000
close(3) = 0
open("/lib64/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\320\1\2\0\0\0\0\0"...,
832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=2125464, ...}) = 0
mmap(NULL, 3956544, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7fae8bf3a000
mprotect(0x7fae8c0f6000, 2097152, PROT_NONE) = 0
mmap(0x7fae8c2f6000, 24576, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1bc000) = 0x7fae8c2f6000
mmap(0x7fae8c2fc000, 16192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fae8c2fc000
close(3) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fae8d2ab000
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fae8d2a9000
arch_prctl(ARCH_SET_FS, 0x7fae8d2a9880) = 0
mprotect(0x7fae8c2f6000, 16384, PROT_READ) = 0
mprotect(0x7fae8c517000, 4096, PROT_READ) = 0
mprotect(0x7fae8c73c000, 4096, PROT_READ) = 0
mprotect(0x7fae8c952000, 4096, PROT_READ) = 0
mprotect(0x7fae8cc5b000, 4096, PROT_READ) = 0
mprotect(0x7fae8d09f000, 4096, PROT_READ) = 0
mprotect(0x7fae8ce97000, 12288, PROT_READ) = 0
mprotect(0x666000, 12288, PROT_READ) = 0
mprotect(0x7fae8d2c4000, 4096, PROT_READ) = 0
munmap(0x7fae8d2ae000, 84288) = 0
set_tid_address(0x7fae8d2a9b50) = 1111
set_robust_list(0x7fae8d2a9b60, 24) = 0
rt_sigaction(SIGRTMIN, {0x7fae8c305b60, [], SA_RESTORER|SA_SIGINFO,
0x7fae8c30f970}, NULL, 8) = 0
rt_sigaction(SIGRT_1, {0x7fae8c305bf0, [], SA_RESTORER|SA_RESTART|SA_SIGINFO,
0x7fae8c30f970}, NULL, 8) = 0
rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
getrlimit(RLIMIT_STACK, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
brk(0) = 0x2669000
brk(0x268a000) = 0x268a000
brk(0) = 0x268a000
open("/proc/self/mounts", O_RDONLY|O_CLOEXEC) = 3
futex(0x7fae8c2fd368, FUTEX_WAKE_PRIVATE, 2147483647) = 0
fstat(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fae8d2c2000
read(3, "rootfs / rootfs rw,seclabel 0 0\n"..., 1024) = 1024
read(3, "cpuacct 0 0\ncgroup /sys/fs/cgrou"..., 1024) = 1024
stat("/", {st_mode=S_IFDIR|0755, st_size=132, ...}) = 0
stat("/", {st_mode=S_IFDIR|0755, st_size=132, ...}) = 0
openat(AT_FDCWD, "/", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 4
ioctl(4, BTRFS_IOC_FS_INFO, 0x7fff21622990) = 0
ioctl(4, BTRFS_IOC_DEV_INFO, 0x26722a0) = -1 ENODEV (No such device)
ioctl(4, BTRFS_IOC_DEV_INFO, 0x26722a0) = 0
close(4) = 0
open("/", O_RDONLY|O_NOATIME) = 4
ioctl(4, BTRFS_IOC_GET_FSLABEL, 0x7fff21622800) = 0
close(4) = 0
open("/", O_RDONLY) = 4
ioctl(4, BTRFS_IOC_SPACE_INFO, 0x266a260) = 0
ioctl(4, BTRFS_IOC_SPACE_INFO, 0x266a280) = 0
fstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 0), ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fae8d2c1000
write(1, "Label: 'rawhide' uuid: d372e5d1"..., 61Label: 'rawhide' uuid:
d372e5d1-386f-460c-b036-611469e0155e
) = 61
write(1, "\tTotal devices 1 FS bytes used 7"..., 39 Total devices 1 FS
bytes used 7.55GiB
) = 39
open("/dev/sda3", O_RDONLY) = 5
close(5) = 0
write(1, "\tdevid 1 size 79.31GiB used 1"..., 55 devid 1 size
79.31GiB used 11.04GiB path /dev/sda3
) = 55
write(1, "\n", 1
) = 1
close(4) = 0
read(3, " rw,relatime 0 0\ntmpfs /tmp tmpf"..., 1024) = 574
stat("/home", {st_mode=S_IFDIR|0755, st_size=10, ...}) = 0
stat("/home", {st_mode=S_IFDIR|0755, st_size=10, ...}) = 0
openat(AT_FDCWD, "/home", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 4
ioctl(4, BTRFS_IOC_FS_INFO, 0x7fff21622990) = 0
ioctl(4, BTRFS_IOC_DEV_INFO, 0x26722c0) = -1 ENODEV (No such device)
ioctl(4, BTRFS_IOC_DEV_INFO, 0x26722c0) = 0
close(4) = 0
open("/home", O_RDONLY|O_NOATIME) = 4
ioctl(4, BTRFS_IOC_GET_FSLABEL, 0x7fff21622800) = 0
close(4) = 0
open("/home", O_RDONLY) = 4
ioctl(4, BTRFS_IOC_SPACE_INFO, 0x266a280) = 0
ioctl(4, BTRFS_IOC_SPACE_INFO, 0x266a2a0) = 0
close(4) = 0
stat("/var", {st_mode=S_IFDIR|0755, st_size=184, ...}) = 0
stat("/var", {st_mode=S_IFDIR|0755, st_size=184, ...}) = 0
openat(AT_FDCWD, "/var", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 4
ioctl(4, BTRFS_IOC_FS_INFO, 0x7fff21622990) = 0
ioctl(4, BTRFS_IOC_DEV_INFO, 0x26722c0) = -1 ENODEV (No such device)
ioctl(4, BTRFS_IOC_DEV_INFO, 0x26722c0) = 0
close(4) = 0
open("/var", O_RDONLY|O_NOATIME) = 4
ioctl(4, BTRFS_IOC_GET_FSLABEL, 0x7fff21622800) = 0
close(4) = 0
open("/var", O_RDONLY) = 4
ioctl(4, BTRFS_IOC_SPACE_INFO, 0x266a280) = 0
ioctl(4, BTRFS_IOC_SPACE_INFO, 0x266a2a0) = 0
close(4) = 0
stat("/mnt", {st_mode=S_IFDIR|0755, st_size=30, ...}) = 0
stat("/mnt", {st_mode=S_IFDIR|0755, st_size=30, ...}) = 0
openat(AT_FDCWD, "/mnt", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 4
ioctl(4, BTRFS_IOC_FS_INFO, 0x7fff21622990) = 0
ioctl(4, BTRFS_IOC_DEV_INFO, 0x26722c0) = -1 ENODEV (No such device)
ioctl(4, BTRFS_IOC_DEV_INFO, 0x26722c0) = 0
write(2, "btrfs: utils.c:1769: get_fs_info"..., 87btrfs: utils.c:1769:
get_fs_info: Assertion `!(ndevs >= fi_args->num_devices)' failed.
) = 87
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7fae8d2c0000
rt_sigprocmask(SIG_UNBLOCK, [ABRT], NULL, 8) = 0
tgkill(1111, 1111, SIGABRT) = 0
--- SIGABRT {si_signo=SIGABRT, si_code=SI_TKILL, si_pid=1111, si_uid=0} ---
+++ killed by SIGABRT (core dumped) +++
Aborted (core dumped)--
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